_Subscribers, lines and UC functions need to be licensed. The country specific power cord must be ordered separately. Following the initial startup of the system, the licenses must be activated within a periond of 30 days (“activation period”). During this activation period, the system is fully functional. If the total number of subscribers exceeds 72 (UP0/E subscribers, analog subscribers and other subscribers connected via adapters, e.g. Gigasets), an external power supply is mandatory (OpenScape Business Power Box with LUNA2). To guard against electromagnetic interference on the MDF lines of the OSBiz X3W and X5W systems, ferrite sleeves must be used on each line. One kit with 5 ferrite sleeves (L30251-U600-A229) is already included in the delivery package of the basic system (enough for the ports provided by the motherboard). Further sleeves must be ordered separately, as required; one sleeve must be calculated per 3 additional ports (S0, analog, UP0/E, loop start). One ISDN cable L30251-U600-A151 is required for each of the 2 S0 exchange connections provided in the basic system._